ArcSDE在地理空间数据存储中的应用研究

简要介绍了ARCSDE空间数据引擎的技术原理,以及ArcSDE的基本概况,并对如何建立一个基于ArcSDE引擎实现的空间数据库进行了探讨,说明了数据库的规划、入库管理、访问和应用中的基本问题。     

ARCSDE与Oracle9i Spatial空间数据转换方法研究

通过空间数据库引擎技术(SDE)可以有效地实现空间数据在数据库中的管理。但各种空间数据库引擎在储存数据格式上的不一致,都会影响各引擎相互问数据操作的效率。文中以ESRI公司的ArcSDE和Oracle公司的Oracle Spatial为例．通过分析以上两种空间数据库引擎的数据格式,解决了从ArcSDE向Oracle9i Spatial的空间数据的转换问题。     

基于ArcSDE的信息基础设施空间数据库的设计与实现

ArcSDE作为空间数据引擎,在地理信息系统中有着广泛的应用,它能有效的提高空间数据库的管理效率。本文在对常用空间数据引擎比较的基础上,根据信息基础设施空间数据种类多、数据量大的特点,提出了基于ArcSDE SQL Server 2000技术构建的信息基础设施空间数据库建设方案,实现了海量数据的空间存储和有效管理,有利于信息的共享和充分利用,并在实际应用中取得了很好的效果。     

基于ArcSDE和Oracle的空间数据集成应用研究

简要回顾了3种空间数据模型的发展,并总结了它们的优缺点;其次介绍了 ArcSDE 的功能、体系结构,并与 Oracle Spatial 进行比较,分析了 ArcSDE 在存储和管理空间数据库方面的优势;最后通过 ArcSDE 存储了一幅栅格数据,展示了 ArcSDE 用于空间数据的存储和管理的优越性。     

基于ArcGIS与ASP.NET的流域水质监测系统开发研究

针对监测站迫切需要升级现有信息系统,实现流域水质监测质量控制与数据管理的需求,本文提出了利用ArcGIS Flex API,ArcSDE,ArcGIS Server等ArcGIS技术,ASP.NET及数据库技术集成开发＂流域水质监测系统＂的方法。对系统技术架构、功能及数据库进行了设计,在系统实现过程中提出了基于数据共享、Web Service与网页链接等技术的MIS与GIS的集成方法,利用SQL语句直接访问ArcSDE空间数据来维护数据一致性的方法,以及基于数据库触发器及ArcSDE版本注册的空间数据自动更新方法。实验结果表明,新系统可以提高监测信息的准确性、可视性和时效性。     

基于ArcSDE的信息基础设施空间数据库的设计与实现

ArcSDE作为空间数据引擎，在地理信息系统中有着广泛的应用，它能有效的提高空间数据库的管理效率。本文在对常用空间数据引擎比较的基础上，根据信息基础设施空间数据种类多、数据量大的特点，提出了基于ArcSDE＋SQLServer2000技术构建的信息基础设施空间数据库建设方案，实现了海量数据的空间存储和有效管理，有利于信息的共享和充分利用，并在实际应用中取得了很好的效果。     

基于ArcSDE的数字城市规划空间数据库设计与实现

在对数字城市规划空间数据库进行研究的基础上,利用空间数据引擎ArcSDE作为GIS应用服务器与数据库服务器之间的接口,以ArcSDE为核心实现数字城市规划空间信息的空间查询与空间分析,对数字城市规划的空间数据和属性数据进行统一管理,实现支持高效的、海量数据的提取。     

基于ArcSDE的煤矿安全应急救援数据库的建设

阐述了ArcSDE体系结构及原理,根据煤矿安全应急救援信息空间特征及业务需求,提出了利用ArcSDE组件和SQL Server2005建设应急救援空间数据和属性数据数据库方案,使得空间数据与属性数据能够相互关联,实现统一管理。以建立陕西省彬县某煤矿救援中心数据库为例,介绍了建立煤矿安全应急救援空间数据库的基本技术,实现了空间信息的可视化查询,能够提高煤矿安全应急救援的工作效率。     

基于ArcSDE的机场净空管理系统空间数据库设计

空间数据库是GIS的核心之一。以上海机场净空管理系统为例,简要介绍了ArcSDE（空间数据引擎）的特点,并结合用户的需求详细介绍如何建立一个基于ArcSDE的空间数据库,分析数据库的设计、多源数据入库和数据库管理功能设置等基本问题。     

基于ArcSDE和Oracle的海岛空间数据库框架设计

结合海洋行业应用需求,针对海岛空间信息特点,借助空间数据引擎(ArcSDE)和关系数据库(Oracle)技术,构建海岛空间数据库框架体系,实现海岛空间数据的统一、高效管理,为海岛空间数据组织和管理提供一个有效的解决方案,同时为海岛管理信息系统提供数据支持。     

阿克苏河-塔里木河水系水质污染遥感监测与评价

 采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的 污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体 污染变化曲线,得出污染物浓度随着远离上游而增加。     

Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data

The hard-rock hilly Aravalli terrain of Rajasthan province of India suffers with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. In the present study, detailed analysis of meteorological and hydrological data of the Aravalli region has been carried out for the years 1984–2003. Standardised Precipitation Index (SPI) has been used to quantify the precipitation deficit. Standardised Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI) and Temperature Condition Index (TCI) and Vegetation Health Index (VHI) have been computed using NDVI values obtained from Global Vegetation Index (GVI) and thermal channel data of NOAA AVHRR satellite. Detailed analyses of spatial and temporal drought dynamics during monsoon and non-monsoon seasons have been carried out through drought index maps generated in Geographic Information Systems (GIS) environment. Analysis and interpretation of these maps reveal that negative SPI anomalies not always correspond to drought. In the Aravalli region, aquifer-stress shifts its position time to time, and in certain pockets it is more frequent. In comparison to hydrological stress, vegetative stress in the Aravalli region is found to be slower to begin but quicker to withdraw.     

Landslide risk analysis between Giri and Tons Rivers in Himachal Himalaya (India)

The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies.     

Gravity Changes Before Large Earthquakes in China: 1998-2005

Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200...     

GNSS系统及其技术的发展研究

阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议.     

“4D”技术及其应用

介绍“４Ｄ”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。     

Virtual Australia: its key elements – know,think, communicate

Abstract

Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised.     

地理数据库的关系模型及其实现

本文从以图论观点分析地理实体入手,系统阐述了地理数据库关系模型的设计法和过程。作者于1984年4～9月间在微型机上设计建立了关系型地理数据库的实方验系统(RGDB)。该系统采用了本文提出的关系模型,采用了可动态扩库的子库组合结构,这种结构具有灵活性和提高空间利用率的优点。RGDB含有多种功能的数据操作命令,除了具有一般检索功能外,还能进行“开窗”选取和十分“自由”的映象选取。本文对RGDB系统的主要性能和实现途径作了扼要介绍。     

Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services

Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders.     

基于WebGL的三维智慧管网系统的设计与实现

随着城市面貌日新月异,地下管网的建设也在持续推进,作为城市的地下“神经网络”,全天24 h保障城市的正常运转和发展。本文以实现城市管网管理系统的高可用、无插件、智能化为目标,采用“地上地下一体”“二三维一体”的设计理念,研究基于WebGL的三维智慧管网系统的关键技术,实现了管线设施管理的信息数字化、空间化与图形化。